Inlet-valve and water-screen for pumps.



0. H. LILLYMAN.

INLET VALVE AND WATER SCREEN FOR PUMPS.

APPLICATION FILED APR. 19, 1909.

954;, 3 1 3. Patented Apr. 5, 1910.

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INVENI'OR WITNESSES 0Z01 .E Za'ZZymm ATTORNEYS /JM W150 ANuRSW a. GRAHAMc0 WOTO-UTNOORAPHERS. wAsmNqvcn, M;

UN 11E OLOF HENRICK LILLYMAN,

OF POTLATCI-I, IDAHO.

INLET-VALVE AND WATER-SCREEN FOR PUMPS.

Specification of Letters Patent.

Patented Apr. 5, 1910.

Application filed April 19, 1909. Serial No. 490,660.

To all whom it may concern:

Be it known that I, OLOF HnNnLoK LILLY- MAN, a citizen of the UnitedStates, and a resident of Potlatch, in the county of Latah and State ofIdaho, have invented a new and Improved Inlet-Valve and ater-Screen forPumps, of which the following is a full, clear, and exact description.

The invention relates to check valves or strainer inlets. for waterpumps in boats, and for other purposes, and the object of my inventionis to provide novel details of construction for a foot valve for pumpsand for a strainer attachment therefor, that enables the instantcleansing of dirt from the inlet strainer while the valve is in service,and permits the convenient detachment of the foot valve from its casingwhen repair of the valve requires it.

The invention consists in the novel construction and combination ofparts, as is hereinafter described and defined in the claims.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure 1 is a side elevation of the improved foot valve, and of thenovel cleaning attachment mounted thereon; Fig. 2 is a sectional sideelevation of the same; Fig. 3 is a side view of the novel cleaningdevice, the stem thereof being broken away; Fig. 1 is an edge view ofthe cleaning device seen in direction of the arrow :12 in Fig. 3; andFig. 5 is a reversed plan view of the cleaning device in engagement witha strainer forming the bottom wall of the improved foot valve.

In the drawing that illustrates the construction of a novel bottom checkor foot valve for an ordinary suction pump, not shown, 10 indicates theupper portion of a foot valve body, in which a chamber 10 is formed,that is laterally extended through a branch 10 which projects at oneside of said body. At a suitable point below the branch 10", there is adiametrically enlarged valve cage 11, integrally formed on the lowerportion of the body 10, said circularly-walled valve cage having itsexterior surface threaded, as shown at a in Fig. 2. On the cage 11 aninteriorly-threaded annular extension shell 12 is adjustably screwed,the thread in the shell terminating at an annular shoulder Z), that isproduced by a reduction of the diameter of the bore in said shell belowthe thread therein. In the extension shell 1.2 a circularly-edged valveseat plate 13 is neatly fitted, which is seated upon the shoulder Z),said valve seat plate having parallel sides and a plurality ofperforations c therein, which are located between a central hub (Z thatdepends from the valve seat plate, and a point properly spaced from theperiphery of the valve seat. Above the branch 10 the body 10 isdiametrically reduced and is centrally and longitudinally perforated,the bore thus produced in the body receiving a cylindrical stem l lwhich has a sullicient length to permit it to extend down through thebody and extension of the valve cage.

A disk valve 15 is provided for an engagement with the valve seat plate13, said valve consisting of a plate-like circularly-cdged disk having alat-bottomed recess in its normally lower side, that is defined in areaby a circular marginal flange c. In the recessed disk is seated andsecured a flat circularlyedged washer 0, formed of leather or rubher,and as shown in Fig. 2, the disk valve and the hub (Z on the valve seatare centrally perforated for the passage of the stem 14: thercthrough.The cylindrical body of the hub (Z is exteriorly threaded and on it isscrewed a cupped gland d which forms a packing box in which a packing fis held, the compression of which produces necessary friction on thestem 1 1 to prevent it from rotating too freely. In the upper wall ofthe chamber above the disk valve 15, studs 9 are secured, that arespaced apart and project downward an equal distance, said studs whichhave contact with the disk valve, serving to limit the upward movementof the disk valve when lifted by the operation of a pump attached to thebranch 10. In this construction of the strainer attachment, the bottomwall 12 of the extension shell 12 is coniform and foraminated, thenumerous perforations h in said bottom wall being spaced apart so as toform a strainer, which in service prevents mud and floating impuritiesfrom clogging the pump of which the foot valve is an adjunct. The lowerend of the stem 14 passes through a central perforation in the coniformbottom wall 12, and upon said end of the stem at scraper blade is formedor secured.

The scraper blade consists of two members lt that are oppositely andequally diverged from the axis of the stem 14:, the degree of divergenceadapting their upper edges 2' to have scraping contact throughout theirlength, with the coniform surface of the bottom wall l2 on the extensionshell 12. The

stem let extends above the upper end of the body 10 and on the latter apacking boX 10" is provided through which the stem passes, the upper endof said stem having rectangular form for an engagement therewith of asuitable implement which will enable the rotation of the stem andscraper blade.

It will be seen that when the strainer 12 is obstructed by mud or otherforeign matter, such clogging obstructions to the free passage of waterinto the body of the foot valve, may be quickly removed by turning thestem 14 and scraper blade 14;, while the pump and strainer are in use.To cause the scraping edges of the scraper blade 1 F to have propercontact with the coniform wall 12, a coiled spring m is placed 011 thestem near its junction with the blade 14 and seats upon the inner sideof the bottom wall 12, the spring at its upper end having enforcedengagement with a washer n that is mounted upon the stem and is held inplace by a cross key a, as shown in Fig. 2. In some cases the foot valvemay be dispensed with and the strainer device alone be used, whichchange may be readily effected by removing the disk valve 15.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

l. A strainer for pumps, comprising a hollow body having a lateraloutlet and provided with a valve seat and a perforated bottom forming ascreen, a stem extending through both ends of the body, a scraper on oneend of the stem outside of the perforated bottom and in engagementtherewith, and a disk valve slidably mounted on the stem within the saidbody.

2. A strainer for pumps, comprising a hollow body having a lateraloutlet and provided with a valve seat and a conical perforated bottomforming a screen, a stem extending through the ends of the body,oppositely arranged and upwardly inclined scraper blades on one end ofthe stem, a spring on the stem for holding the scraper blades inengagement with the said bottom,

and a valve slidably mounted'on the stem within the casing.

3. A strainer for pumps, comprising a hollow body, an outlet branch onone side of the body, a coniform foraminated bottom wall on the body, astem centrally rotatable in the body and in the bottom wall, one end ofthe stem projecting beyond the body, a scraper blade on the stem havingopposite divergent members that engage the outer surface of the bottomwall, an expansible spring mounted on the stem and pressing on theforaminated bottom wall, a washer on the stem seated on the spring, across pin in the stem bearing on the washer, and means for rotating thestem.

4. An inlet valve comprising a hollow body, having a valve cage on itslower end, an extension shell screwed on the cage, an apertured valveseat clamped between the cage and shell, a coniform foraminated bottomwall on the shell, a stem centrally rotatable in the shell and body, ascraper blade shaped to engage the outer surface of the foraminatedbottom wall, a disk valve slidable on the stem and seating on theapertured valve seat, a spring on the stem adapted to draw the scraperblade toward the forai'ninated bottom wall and means for rotating thestem.

5. A11 inlet valve comprising a hollow body having a lateral outlet andprovided with a valve seat below the outlet and a conical perforatedbottom forming a screen, a stem mounted to turn in the body with itsends projecting through the ends of the body, upwardly inclined scraperblades on the lower end of the stem outside of the bottom and engagingsaid bottom, a spring on the stem for holding the scraper blades inengagement with the perforated bottom, a disk valve slidably mounted onthe stem within the casing, and projections on the upper wall of thechamber in which the valve works and serving to limit the upwardmovement of said valve.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

OLOF HENRICK LILLYMAN.

Witnesses G. E. ARKWITH, R. S. SMITH.

